Question

I am trying to create a method that checks for internet connection that needs a Context parameter. The JNIHelper allows me to call static functions with parameters, but I don’t know how to “retrieve” Cocos2d-x Activity class to use it as a parameter.

public static boolean isNetworkAvailable(Context context) {
    boolean haveConnectedWifi = false;
    boolean haveConnectedMobile = false;
    ConnectivityManager cm =
        (ConnectivityManager) context.getSystemService(
    Context.CONNECTIVITY_SERVICE);
    NetworkInfo[] netInfo = cm.getAllNetworkInfo();
    for (NetworkInfo ni : netInfo) {
        if (ni.getTypeName().equalsIgnoreCase("WIFI"))
            if (ni.isConnected())
                haveConnectedWifi = true;
        if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
            if (ni.isConnected())
                haveConnectedMobile = true;
    }
    return haveConnectedWifi || haveConnectedMobile;
}

and the c++ code is

JniMethodInfo methodInfo;
if ( !JniHelper::getStaticMethodInfo( methodInfo,
    "my/app/TestApp", "isNetworkAvailable", "(Landroid/content/Context;)Z")) {
        //error
        return;
}
CCLog( "Method found and loaded!");
methodInfo.env->CallStaticBooleanMethod( methodInfo.classID,
methodInfo.methodID);
methodInfo.env->DeleteLocalRef( methodInfo.classID);

Answer 1

Cocos2dxActivity.java:
Add this line to Cocos2dxActivity: private static Activity me = null;
Remove this line from onCreate:

Cocos2dxActivity.context = getApplicationContext();

In its place put: me = this;

use :

(ConnectivityManager) me.getSystemService(
    Context.CONNECTIVITY_SERVICE);

Now you don’t need to pass the context from your Jni… I know this is not the solution but for your case you don’t need to worry about context from Jni.. You can simply do your work.

Hope this helps.. I used this way to send mail from android in my game. 🙂